Electric cloth-cutting machine.



A. P. KOMOW.

ELECTRIC CLOTH CUTTING MACHINE.

APPLICATION FILED-MAR. 25. 1916.

Patented Oct. 23, 1917.

INVENTOR- v A. P. KOMOW. ELEfiTRiC CLOTH CUTTING MACH INE.

APPLICATON FILED MAR. 25. I916.

Patent/ed Oct. 23, 1917.

2 SHEETS-SHEET 2.

INVEHTOR UNITED sra'rns PA ENT 01 53 ALBERT r. KOMO'W, on BROOKLYN, new YonK, ASSIGNOR to unirnn spawns cLo'rH comma MACHINE 00., me, or new YORK, N. Y., A oonronarrozu .o'F-LNEW YORK.

ELEGTRIC CLOTH-CUTTING MACHINE.

- Specification of Letters Patent.

Application filed March 25, 1916. Serial m5. 86,533. 1

To all whom it may concern: I

Be it known that I, ALBERT P. Kenton, a citizen of the United-States, and a resident of the borough of Brooklyn, in the 5 county of Kings and State of New York,

have invented certain new and useful Improvements in Electric Cloth-Cutting Machines, of which the following is a specification.

One of the objects of the invention is to increase the ease and accuracy with which electric cloth-cutting machines may be operated, byafl'ording the operator a clear view of the region where the cutting is taking place. In the earlier forms of electric cloth-cuttingmachines, the motor for driving the knife was bulky in its arrangement and seriously obstructed the view. Subsequently there was an endeavor to reduce the transverse width of the motor. In the present invention I make no attempt to minimize the total width of the motor crosswise of the machine, recognizing that a clear line of sight is required only at the side of the'machine where the knife is-located, and

that it is immaterial if the motor projects to a substantial distance at the, opposite side;

I accordingly utilize a motor having a single horse-shoe field magnet with its field '80 windings disposed in projecting relation at the side of the machine remote from the knife, the overhang of the motor'at the' knife side being comparatively slight.- By

- this same means the rearward overhang of" the -motor is also reduced, which enables the hand grip to be moved closer to the standard, thereby increasing the ease and outward away from the knife edge. The" grinder, instead ofbeing mounted to swing through a wide are as is customary, is conwhereby the grinder disks may be disposed in non-projecting relation beneath the overhang of the motor and may be brought into" and out of action by a movement of small extent. -The guard, as herein constructed,

ertainty with which the operator may structed and supported to slide vertically,-

ismounted to swing about a vertical axis at Patented. Oct. 23, 1917. I

its rear portion, and is normally locked in guarding relation tothe knife-by means of a hook carried by the longitudinally movable operating'member.

The invention also comprises a novel and advantageous mounting for the individual grinder disks, supporting the same firmly against displacement and; permitting .quick,

adjustment.

Still another object is to provide a' cloth raiser, :which carries the goo s toward the, knife rather than away from it when brought Y into action, This-is accomplished by so constructing and mounting the cloth raiser that it has a simultaneous longitudinaland age adaptedto exert rearward draft upon a portion ofthe raiser projecting downward through a slot or slots in the base.

Another object is to provide an improved: constructlon' and arrangement of the knife and its large gear and the ball bearing.-

whereby'these are-journaled inthe standard, the advantages being ready removability of the knife and gear, leaving the ball bearing in the standard, and the exclusion of dust fromthe ball bearings without'the necessity of special provisions to that end, because of the tortuous path which particles n'lust'traverse before reaching the bearing.

These and other features and advantages of the'invention will become apparent as the specificationproceeds and the novel parts and combinations will be more particularly.

pointed out in; the appended claims.

In the'drawmgs;

.Figure l is a side elevation of a. machine looking at the knife 'side,s vith .half of the superstructure in. vertical- ,ction, the guard and grinder being shown in normal position; I

Fig. 2153a plan view of the machine with the superstructure half in, \horizontal sec tion;

Fig 3 is affront elevation with the lower parts broken away'and in section and the guard and grinder brought into the posi; tions which they occupy when the knife is sharpened;. i r

Fig. dis a disassembled planyview' of the field frame, the arran'gementlTof this view" being selected to correspond'with that .Tof I Fig.8; 1=

' and employing broken lines to illustrate the actuated positions of these parts;

Fig; 6 is a side elevation of one of the grinder disks, showing its mounting in the bracket arm;

naegoss tilating theupper portion of the motor, in

cluding the commutator 16 and brushes 17, in the following manner:18 is aaupper cas ing secured to the top of the field magnet and having upaierhts. i9 carr brushes (only one upright and. brush a be ing shown) and. a head 20 connecting these uprights andcontaining the upper bearing 21 of the armature shaft. The said upper vin g the 6, taken in the plane of the axis;

Fig. 7 is a vertical section through Fig.

' casing is also provided near its, periphery with an upstanding flange 22, which is en circledby the depending skirt of a cover 23,

the latter having a ,ce'ntralopening where- J by it may be placed over the head BO to rest Fig. 8 is a fragmentary side sectional elevation of parts at the lower portion of the machine, showing the cloth raiser and its operating mechanism-in actuated condition;

Fig. ,9 is a similar view with the parts in normal position;

Fig.10 is a view of these parts in bottom plan; and,

Fig. 11 is a vertical transverse section through the standardand adjacent parts, showing more particularly the mounting and relation of the knife, gear and the ball bearing in the standard.

The machine is provided with the customary base 1. and its standard 2 rising therefrom, the rotary knife 3 being journaled at one side of the standard, and the electric motor 4 for driving the knife constituting the superstructure of the machine. The vertical shaft .5 of the armature 6 of this motor drivesthe knife by means of a bevel pinion 7 at its lower end meshing with the large bevel knife,v gear 8 through an opening 9 in the standard. The motor has a single horse-shoe field magnet 10, illustrated in detail in Fig. 4, whereof the pole pieces 11 are disposed toward the front'and back ofthe machine and a connecting core 12 with a single exciting coil 13 thereon at the side away from the knife. At this side of the machine, accordingly, the motor projects to a substantial distance, as seen in Fig. 3, but at the opposite side its external lines lie comparatively close to the plane of the knife. The base 1,'it will be understood, is of :ulequatewidth to prevent any overxbalancing tendency, in addition to which the amount of overhang at the off side may be minimized by forming the coil 13 of a flat oval form with its major axis vertical.

By virtue of the described construction .the operator is. afforded an advantageously clear view of. the knife and of the progress of the cut, and, there being no coils at the back of the machine, the handle 14, whichis shown broken away in the views, may be shortened so that its grip is brought nearer to the machine, with the consequent advantage "already noted. The field magnet as" preferably constructed has its pole pieces and core formed separately and united by bolting onscrewing, and the polepieces are comparatively narrow and are curved at the extremities, as shown inlfig. 4.

Means areprovidedfo housing and venupon a shoulder-10f the supporting" struc- 30 ture, as seen in Fig. 1;"and being held in place by a cap 2 screwed'ontdthe head 20.

The interior of the skirt 23, where it over I laps the upstanding flange 22 is, fluted 'o'r" provided with air channels,substantially as shown. in Fig.2for example, thereby permit; ting free access ofair' to the parts subject't" heating without danger ofinjury to these parts by tampering or otherwise:

i The grinder, which is lojate d at of the machine, coniprisesa,verticalfste x 5? slidable in a boxed guide 26 secured t the [t front of the field frame portionofjthe. ma-

chine at the side ren otefrom tliej fiel coill 13. cross-section and the guide 26-, formed in The stem is preferably rectangul r infbs two halves united by screws 27, by whic h from time to time any lost motion. due tb y be taken up. At its lower end the stem carries or is united. with substan, tially U-shaped'yoke 28, thelatter beiri I. offset from the stem toward the plane-o f the knife and having its bracket arms 29 extending rearward beneath the overhang of the motor. In the preferred. construction of the grinder theselar'ms are curved to form spliteyes'fiO for t he clampingref The slfiift 33 of each of the grinder disks 3-4 preferably consists of a screw stud having a plain portion revoluble in its bearing, its" head 85 at the outer end and its reduced threaded portion 36 at theinnef'end for engagement by a nut 37 which is received and held within a central recess 38 of the stone. recess is of two diameters and thenut 37 has a reduced portion 39 to fit thesmaller por-f As illustrated in Fig. 7, the said tion of 'the recess'and a relati zoly enlar'ged l head 40 which overlies and boa-1s against the shoulder in the recess. In assemblingthese of a screw driver, the nut 37 being prefer- 12 5 I parts, the screw stud 33 'is turned by means ably fixed in the stone, until' the outer side of the stone 'is brought to bear against washer 41, and the latter in turn againstfiso' the knife is held upon the knife gear, and

. the latter is fixedly secured to the rotary member 78 of the ball bearing. By simply unscrewing the cap screw 75, the knife and knife gear may be removed, leaving the ball bearing and studv 74 in place in the standard. In order to keep the stud 74 from turning when the cap screw 75 is applied or removed, an opening 77 may be formed through the bossed portion 78 of the standard, in order to permit a pin to be inserted into a recess 79 which may be caused to register with this 0 )ening. The gear 8 is of dished formation, its teeth being formed upon a flange which extends into an annular recess 80 in the standard concentric with the recess carrying the. ball hearing. In this wayany particles of dirt, in order toreach the hearing, would have topass through a narrow and circuitous path. with the result that the bearing is effectually protected and requires tobe cleaned only at comparatively long intervals.

In conclusion. I would state that while I have illustrated the preferred embodiment of my invention and described the same in. detail, it is to be understood that numerous changes ;may be made without departing from essentials and that I do not necessarily limit myself to the precise details of construction shown.

What I claim asnew is:

1. In a rotary knife cloth-cutting machine, the combination with the rotary knife and framework, of a grinder having a mounting wherein it may slide vertical l y on the frame- I work of the machine, a knifeguard mount ed to swing about a vertical axis toward the rear of the framework, and a common operating member mounted for fore and aft movement on the framework and having means foroperating both the'guard and the grinder.

2. In a rotary knife cloth-cutting machine, the combination of a vertically slidable grinder, a knife guard hinged at its rear portion to swing about a vertical axis, and an operating membermounted for forvard and backward movement and having in clines for operating said guard and grinder.

3. In a rotary knife cloth-cutting machine, the combination of a vertically slidable grinder having a. pair of abutments, a knife, guard hinged to swing about a vertical axis, and an o]')erating slide. movable fore and aft on the machine and having an oblique forward portion operating between said abutments, theslidc also havihg an i cline in rear'of said oblique portion to act .por. the guard.

' 4. In arotary knife cloth-cutting machine, the combination of a vertically slidable grinder, a knife guard hinged to swing about a vertical axis, andan operating slide movable fore and aft on the machine and havingan incline at its forward portion for effecting the vertical movement of the grinder, another incline for effecting the lateral swinging offlthe' guard, and a hook" which normally lo cks the guard against movement.

5. In a rotary knife cloth-cutting machine, x

the combination of a grinder having a vertical stem, a guide slidably receiving said stem, a yoke carrying grinder disks on the lowerend of the stem, and a fore and aft movable operating slide having anincline for depressing the grinder.

6. In a rotary knife cloth-cuttingmachinef I the combination of a grinder "having a mounting wherein it slides vertically, and a fore and aft movable operating member having an incline for eflectingthe vertical movement of the grinder.

-7. In a rotary knife cloth-cutting machine, the combination with the" knife, of ave r' tically 'slidable grinder having a pair of ab'utments, a horizontally slidable operating member extending fore and aft of the machine and having an oblique portion operating between said abutments, and a spring acting upon the said member to restore the sameand the grinder to normal position.

8. In a rotary knife cloth-cutting machine, the combination withthe knifeyand stand ard, of a grinder having a'slide portion guided for vertical movement above and toward the front of the knife and a yoke comprising rearward extending arms, and grinder disks carried by said arms.

9. A rotary knife electric cloth-cutting I machine, comprising'a base, standard, knife and motor fordrivmg the knlfe, and in combination therewith, a grinder having a slide portion guided for vertical movement ad jacent the front of the frame of the motor,

and arms extending rearward from the forward and rearward on the. framework,

of the machine and having an incli-ncfor swinging the guard.

12. In a rotary knife electric cloth-cutting machine, the combination with the knife, of

a knife guard hinged at its rear portion. to

swing about a vertical axis to clear the knife edge, and an operating slide having I hinge.

an incline for swinging the guard outward by a wedging action exerted adjacent its 13. In a rotary knife electric cloth-cutting machine, a knife guard having a vertical hinge mounting at its rear portion, and a 1 reciprocatory operating member having an adjacent the hinge to swing the same away from the knife, the said operating member also having a portlon which normally locks the guard.

15. In a rotary knife electric cloth-cutting machine, the combination of a hinged knife guard, and an operating slide having an machifie, the combinationof the stand incline to swing the guard outward, and a hook on the slide normallv detaining the guard. i

16. In a rotary knife electric cloth-cutting ,machine, and in combination with the base,

standard and rotary knife on the standard, a cloth raiser mounted to slide rearward and forward and to tilt upon the base beneath the forward portion of the knife.

17. In a rotary knife electric cloth-cutting machine, a cloth raiser having a slidable and Q downward portion gu ed in said slot, and means contilting mounting and linka 2e for operating the same.

18. In a rotary knife electric cloth-cutting machine, and in combination with the base, standard and rotary knife on the standard, a cloth raiser titlable about its forward portion on the base and also slidable thereon,"

a downward projection on the forward part of the cloth raiser, and means for exerting rearward draft upon said projection.

19. In a rotary knife electric cloth-cutting machine, the combination of the base having a longitudinal slot, a cloth raiser having a rejecting lug on its forward the nected with said lug for drawing the same rearward to fulcrum ag'ainstthe rear end. of the slot.

20. In a rotary knife electric cloth-cutting machine, the combination of the base having a longitudinal slot, a cloth raiser having a portion operating in said-slot and adapted to fulcrum against the rear end thereof,

whereby the raiser has sliding and tilting movement, and suitable operating connections for effecting such movement.

21. In a rotary knife electric cloth-cuttm machine, the combination of the stander having a recess, a" ball bearing comp outer and inner members with balls between, the outer member being fixed in said recess, a headed stud passed through the inner member of the ball bearingand rotatable therewith, a knife ear, and a screw engaging said stud and aving a head overlying the outer face of the knife gear.

22. In, a rotary knife electric cloth cutting having a recess, a ball bearing; comprising outer and inner members with balls between,

the outer member being fixed in said recess,

a knife gear, a knife centered on the-knife gear, and a cap screw securing the knife-to the knife gear and both to the inner member of the ball bearing.

23. In a rotary knife electric cloth-cutting machine, the combination of a knife gear,

a knife-against the knife gear, a rotary sup- .port, and a single central screw for holdin knife to the knife gear and both to rotary support.

' 24. In a rotary knife electric cloth-cutting machine, the combination of a standard hava recess, a ball bearing seated in said recess, a knife and knife gear at the side of the standard, and a detachable connection between the knife gear and the ball bearing, the knife gear being dished with'its tooth flange pro ecting into an annular recess in the standard, whereby the bearing-is fur ther p tctecteiil ALBERT r. Konow. 

